The Groups plugin is not a fully independent plugin. Part of its functionality (specifically the entity type "groups" itself) is in Elgg core.

It might still be possible to change the references to group appearing on the frontend of your Elgg site (so it looks like "newspaper" instead). But it's not possible (or at least it would be a very large effort necessary to modify also Elgg core) to change the usage of the "group" data entitities. And you would also not be able to use the original groups plugin in parallel to your newspaper plugin as you would still have only one type of groups entities.

I don't think it will be possible to fully separate the groups code from Elgg core to allow for cloning the groups plugin. There would be a lot of knowledge necessary for a start and even then I don't know if you can really do it in the end.

Another way to add the "Newspaper" / Fanpages feature could be using the Subgroups plugin (https://elgg.org/plugins/1104964). You could create a parent group that is used to host all the fanpages as subgroups.

I think that's not what i want, I want my user can make a Fanspage (like Facebook) , Iionly said it is very hard to duplicate and modify Group mod . So it think i need a plugin that allows user to make 2 account. 1 normal account and 1 Fanspage